%0 Journal Article
%T Study on Phosphorus(P) Fixation in the Sediment of Lake Using the Clays Modified by LaCl3<br>氯化镧改性黏土固化湖泊底泥中磷的研究
%A YUAN Xian-zheng
%A PAN Gang
%A TIAN Bing-hui
%A CHEN Hao
%A <br>袁宪正
%A 潘纲
%A 田秉晖
%A 陈灏
%J 环境科学
%D 2007
%I 
%X 14 kinds of clay modified by LaCl3 were prepared and their phosphorus (P) fixation was studied. The effect of pH on adsorption rate of P using kaolin modified by LaCl3 and dissolved concentration of La3+ from them were also discussed. The results showed that the fixation rates of P using clay modified by LaCl3 were improved to 52%~95% from 3%~14% using unmodified clay. The maximum adsorption rate of P using kaolin modified by LaCl3 was 94.85% on the pH value of 5. Under the condition of pH range from 4 to 8, the P adsorption rate was higher than 80%. When the pH value was higher than 6.5, the dissolved concentration of La3+ from the modified clay was lower than 0.0178mg/L. This research provided an important way to solve internal phosphorus pollution in sediments of lakes.
%K treatment of internal phosphorus
%K clay modified by LaCl3
%K eutrophication
%K P removal<br>湖泊内源污染治理
%K 氯化镧改性黏土
%K 富营养化
%K 磷去除
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=66D50FD7EACF64A4E9F1BCC228853CF0&yid=A732AF04DDA03BB3&vid=D3E34374A0D77D7F&iid=0B39A22176CE99FB&sid=1E9426A299DC9FFD&eid=DA74B62FE4348759&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=31